private static void OnSetCommandParameterCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ComboBox cb = d as ComboBox;
if (cb != null)
{
//Acquire behavior attached to the list view and set the command parameter
//The behavior class executes the command
ComboBoxSelectCommandBehavior behavior =
GetOrCreateBehavior(cb);
behavior.CommandParameter = e.NewValue;
}
}
private static ComboBoxSelectCommandBehavior GetOrCreateBehavior(ComboBox cb)
{
//First get the behavior, maybe it is already created
ComboBoxSelectCommandBehavior behavior =
cb.GetValue(SelectCommandBehaviorProperty) as ComboBoxSelectCommandBehavior;
if (behavior == null)
{
//if the behavior is not created then create one
behavior = new ComboBoxSelectCommandBehavior(cb);
cb.SetValue(SelectCommandBehaviorProperty, behavior);
}
//return the behavior
//Caller function sets the command or command parameter properties
return(behavior);
}